OTRC: Colin Hanks joins 'Dexter' for season 6 (Spoilers)

Colin Hanks is set to appear on the upcoming sixth season of "Dexter," the Showtime series that stars Michael C. Hall as a serial killer.

Warning: Spoiler alert!

Colin Hanks, the 33-year-old son of actors Tom Hanks and Rita Wilson, will play Travis, a "highly intelligent young expert on ancient artifacts who gets linked to a series of grisly murders in Miami," on all 12 episodes, the cable network said in a statement obtained by OnTheRedCarpet.com on Tuesday, May 10.

Hall plays main character Dexter Morgan, a serial killer who only targets people responsible for murder and moonlights as a blood spatter analyst at the Miami Police Department. It is unclear if Colin Hanks' character is a villain. Notable guest stars of the past include John Lithgow, who played a killer, and Julia Stiles, who portrayed Morgan's love interest.

Colin Hanks is known for roles in films such as "Orange County" and "King Kong" and played Father John Gill on the AMC 1960s-era drama series "Mad Men." He also portrayed Jack Bailey on the series "The Good Guys."

The sixth season of "Dexter" premieres in the fall of 2011 and production on it begins in June, Showtime says. Showtime president David Nevins told TVLine.com that Morgan will not face off against one villain, adding: "There's one interesting story that will move through the season, and it will be cast very interestingly, but it's not exactly that one person.